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krunvm vs Firecracker: catalog facts
krunvm	Firecracker
Free Free to use from its GitHub repository.	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS, Linux, Command line	Linux, Command line
Builds microVMs directly from OCI images Fast boot with a small footprint	Targets container and function-based server infrastructure.
Command-line only Depends on libkrun and buildah being installed	Requires Linux virtualization support and low-level configuration.
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.